DESGKIPTION OF SPECIES— LAURINE^. 217 



as that of the former; the borders appear recurved; the secondary veins, on 

 an angle of divergence of 30°, are very strong, deeply marked, the surface 

 between them being bossed or irregularly convex, and their base is marked 

 by small inflated dots, like the impressions of axillar glands. These veins are 

 comparatively close, equidistant, and parallel from the base to above the middle 

 of the leaf, the upper pair only being placed higher above; all are connected 

 in their marginal bows by strong nervilles. Though distantly comparable to 

 the former species, it greatly differs by its oblong shape, the thick lateral 

 nerves, the glands, etc. This character relates it to the living Laurus Cana- 

 riensis, from which it especially differs by its rounded, abruptly acuminate 

 top. The midrib is narrow, at least comparatively to the thickness of the 

 lateral nerves. 



Habitat. — Mount Brosse, Colorado, with a large number of specimens 

 of Araliopsis affl?iis {Dr. F. V. Hayden). 



TETRANTHERA, Jack. 

 Leaves entire, penninerved, with the characters of the Lauritiio;; calix or involucre quadrifid. 

 Xetrauthera scssili flora, Lesqz. 



Plate XXXIV, Figs. le,ld; Plate XXXV, Figs. 8, 9. 



Lanrua aeasiliflora, Lesqx., Annual Report, 1873, p. 407. 



Leaves subcoriaceous, small, obovate-lanceolate, obtusely pointed ; lateral veins distinct, open, 

 the lowest pair at a more acute angle of divergence; receptacle sessile, four-lobed, lobes entire, acute ; 

 fruits oval, nutlets striate, pericarp smooth, detaching in fragments. 



I consider all the fragments represented upon the specimen in fig. 8 as 

 referable to the same species. The leaves, five to six centimeters long, pro- 

 portionally broad, oblanceolate in fig. 8 a, oblong-lanceolate in fig. 9, gradually 

 narrowed to the petiole, rounded and narrowed upward to an obtuse point, 

 are distinctly nerved. The lower pair of secondary veins is more oblique, 

 ascends higher in following the borders; the others, diverging from the mid- 

 rib at an angle of 40° to 50", are curved, parallel, inequidistant, joined by 

 strong, mostly simple nervilles, all following quite near the borders in simple 

 bows. The involucre b is evidently sessile, quadrilobatc, with the divisions 

 comparatively long (five millimeters), and apparently joined at the base, taper- 

 ing to an obtuse point. The berries c, d, five millimeters broad and eight 

 long, are ovate, obtuse, with a smooth or obscurely lined surface. The frag- 

 ment of a branch in fig. e has its surface of the same character as the branchlet 



